KES SUS 304 Stainless Steel Contemporary Safety Door Stop Metal Door Holder Doorstop with Sound Dampening Rubber Bumper Heavy Duty Brushed Finish, HDS218-2 RUSTPROOF: Manufactured from T-304 premium-grade stainless steel, added 18/10 Chromium/Nickel content to protect against corrosion & rust. RUBBER BUMPER: Include a high quality rubber bumper. DURABLE FINISH: Brushed stainless steel finish, build to resist daily scratches and corrosion. Rubber bumper diameter: 40 mm or 1.6-inch; Base diameter: 45 mm or 1.8-inch EASY INSTALLATION: Hardware pack included.